ModelSim is a function simulator from Mentor graphics for ASIC /FPGA designs. It supports both Verilog/SystemVerilog and VHDL languages, but have limited support for advanced System Verilog language (and specifically OVM/UVM/ etc.

It can be used for Altera (now Intel) FPGA design simulations. Otherwise there is nothing like ModelSim-Altera.

As 2018 comes to and end, writing on Quora has become a habit for me. Looking back through 2018 answers, I am summarizing a select set of questions that I feel was most useful to the readers. These were the ones I see got the maximum views and up-votes and I take it as a feedback on the answers.